Response and resistance to NF-κB inhibitors in mouse models of lung adenocarcinoma.

Journal Article (Journal Article)

UNLABELLED: Lung adenocarcinoma is a leading cause of cancer death worldwide. We recently showed that genetic inhibition of the NF-κB pathway affects both the initiation and the maintenance of lung cancer, identifying this pathway as a promising therapeutic target. In this investigation, we tested the efficacy of small-molecule NF-κB inhibitors in mouse models of lung cancer. In murine lung adenocarcinoma cell lines with high NF-κB activity, the proteasome inhibitor bortezomib efficiently reduced nuclear p65, repressed NF-κB target genes, and rapidly induced apoptosis. Bortezomib also induced lung tumor regression and prolonged survival in tumor-bearing Kras(LSL-G12D/wt);p53(flox/flox) mice but not in Kras(LSL-G12D/wt) mice. After repeated treatment, initially sensitive lung tumors became resistant to bortezomib. A second NF-κB inhibitor, Bay-117082, showed similar therapeutic efficacy and acquired resistance in mice. Our results using preclinical mouse models support the NF-κB pathway as a potential therapeutic target for a defined subset of lung adenocarcinoma. SIGNIFICANCE: Using small-molecule compounds that inhibit NF-κB activity, we provide evidence that NF-κB inhibition has therapeutic efficacy in the treatment of lung cancer. Our results also illustrate the value of mouse models in validating new drug targets in vivo and indicate that acquired chemoresistance may later influence bortezomib treatment in lung cancer.

Full Text

Duke Authors

Cited Authors

  • Xue, W; Meylan, E; Oliver, TG; Feldser, DM; Winslow, MM; Bronson, R; Jacks, T

Published Date

  • August 2011

Published In

Volume / Issue

  • 1 / 3

Start / End Page

  • 236 - 247

PubMed ID

  • 21874163

Pubmed Central ID

  • PMC3160630

Electronic International Standard Serial Number (EISSN)

  • 2159-8290

Digital Object Identifier (DOI)

  • 10.1158/2159-8290.CD-11-0073


  • eng

Conference Location

  • United States